not unusual explorer.exe is windows explorer so opening my computer uses windows explorer and if you have "Launch folder windows in a separate process" ticked in folder options you will always have two minimum i believe
My Computer
At a glance
win7 ultimate / virtual boxIntel Core i7 3770K,1155, Ivy BridgeGSkill Ripjaws Z Series 1600 CL 9.0 16GBKFA2 GeForce GTX 670 EX OC 2048MB GDDR5 PCI-E...